Amazon.com: Seagate IronWolf Pro 6TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 128MB Cache for RAID Network Attached Storage, Data Recovery Service – Frustration Free Packaging (ST6000NEZ00) : Electronics
Seagate IronWolf Pro NAS ST6000NE0023 6TB 3.5" 7.2K RPM 512E SATA Hard Drive
Seagate IronWolf Pro 6TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST6000NE0021 - Newegg.com